Adenovirus infection controls processing bodies to stabilize AU-rich element-containing mRNA.

Virology

Department of Vascular Biology and Molecular Pathology, Hokkaido University Faculty of Dental Medicine and Graduate School of Dental Medicine, Sapporo, 060-8586, Japan; Department of Molecular Oncology, Hokkaido University Faculty of Dental Medicine and Graduate School of Biomedical Science and Engineering, Sapporo, 060-8586, Japan; Global Center for Biomedical Science and Engineering, Faculty for Medicine, Hokkaido University, Sapporo, 060-8586, Japan. Electronic address:

Published: August 2022

In the adenovirus-infected cells, virus mRNAs are selectively exported to the cytoplasm by virus early gene products to facilitate virus replication. We previously showed AU-rich elements (AREs) containing mRNAs are exported to the cytoplasm and stabilized in infected cells. Here, we analyzed ribonucleoprotein (RNP) granules in the cytoplasm that are involved in mRNA degradation to elucidate the mechanism of ARE-mRNA stabilization in adenovirus infected cells. Our findings showed that processing bodies (PBs) aggregate, then almost all PBs are translocated to aggresomes formed by adenoviral gene products during the late phase of infection. Furthermore, E4orf3 was required for the PBs translocation, and the same domains of E4orf3-mutants required to change the form of promyelocytic leukemia bodies were also needed for PBs translocation. Luciferase activity showed that these domains were critical for miRNA- and ARE-mediated mRNA decay. These findings suggest that adenovirus changes the behavior of PBs to prevent ARE-mRNA downregulation.

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Source
http://dx.doi.org/10.1016/j.virol.2022.06.009DOI Listing

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